Liquidity-adjusted conditional capital asset pricing model

This paper derives a liquidity-adjusted conditional two-moment capital asset pricing model (CAPM) and a liquidity-adjusted conditional three-moment CAPM respectively based on theory of stochastic discount factor. The liquidity-adjusted conditional two-moment CAPM shows that a security's conditional expected excess return consists of three parts: its conditional expected liquidity cost, the systemic risk premium and the liquidity risk premium. The liquidity-adjusted conditional three-moment CAPM shows that a security's conditional expected excess return depends on its conditional expected liquidity cost, the conditional covariance between its return and the market return, the conditional covariance between its liquidity cost and the market liquidity cost, and the conditional coskewness of its return and the market return.     

上海股市流动性和收益率的动态关系研究

研究流动性与收益率之间的关系是证券市场微观结构理论研究的一个重点。文章采用VAR（向量自回归）方法来考察上海股票市场上流动性与收益率之间的关系。先通过VAR的脉冲响应函数来分析两者之间的影响关系，接着从条件分布的角度探索彼此之间的因果联系。综合考虑实证结果，深入了解上海股市流动性与收益率的变动传递过程。     

我国货币政策对股票市场流动性风险的影响——基于流动性波动性的风险测度方法

本文以流动性的波动性度量流动性风险,从货币供应量和利率两个方面,应用VAR模型首次研究了我国货币政策对股票市场流动性风险的影响。研究发现,货币供应量变化与流动性风险负相关,其中,M2变化对流动性风险影响最大,M1变化的影响次之,M0变化的影响最小;利率对流动性风险有正向影响,但影响力度小于货币供应量变化的影响。研究还发现,牛市状态下,货币供应量变化和利率对流动性风险的影响周期长于熊市状态,利率对流动性风险的影响力度明显大于熊市状态;但熊市状态下,货币供应量变化对流动性风险的影响力度相对较大,其中,M0变化对流动性风险的影响明显大于牛市状态。     

Markets liquidity risk under extremal dependence: Analysis with VaRs methods

Value-at-Risk (VaR) is a widely used tool for assessing financial market risk. In practice, the estimation of liquidity extreme risk by VaR generally uses models assuming independence of bid–ask spreads. However, bid–ask spreads tend to occur in clusters with time dependency, particularly during crisis period. Our paper attempts to fill this gap by studying the impact of negligence of dependency in liquidity extreme risk assessment of Tunisian stock market. The main methods which take into account returns dependency to assess market risk is Time series–Extreme Value Theory combination. Therefore we compare VaRs estimated under independency (Variance–Covariance Approach, Historical Simulation and the VaR adjusted to extreme values) relatively to the VaR when dependence is considered. The efficiency of those methods was tested and compared using the backtesting tests. The results confirm the adequacy of the recent extensions of liquidity risk in the VaR estimation. Therefore, we prove a performance improvement of VaR estimates under the assumption of dependency across a significant reduction of the estimation error, particularly with AR (1)-GARCH (1,1)-GPD model.     

Portfolio choice with high frequency data: CRRA preferences and the liquidity effect

This paper suggests a new approach for portfolio choice. In this framework, the investor, with CRRA preferences, has two objectives: the maximization of the expected utility and the minimization of the portfolio expected illiquidity. The CRRA utility is measured using the portfolio realized volatility, realized skewness and realized kurtosis, while the portfolio illiquidity is measured using the well-known Amihud illiquidity ratio. Therefore, the investor is able to make her choices directly in the expected utility/liquidity (EU/L) bi-dimensional space. We conduct an empirical analysis in a set of fourteen stocks of the CAC 40 stock market index, using high frequency data for the time span from January 1999 to December 2005 (seven years). The robustness of the proposed model is checked according to the out-of-sample performance of different EU/L portfolios relative to the minimum variance and equally weighted portfolios. For different risk aversion levels, the EU/L portfolios are quite competitive and in several cases consistently outperform those benchmarks, in terms of utility, liquidity and certainty equivalent.     

Asset pricing in an Islamic economy

ABSTRACT

We define an Islamic economy as one with borrowing restrictions, no leverage, and no risk-free asset. We derive a consumption-based asset pricing model for this economy under standard preferences. We demonstrate that news to consumption growth is the main driver of Islamic financial markets, but the degree of borrowing constraints also affects the pricing of Islamic assets. Using Saudi Arabian data, simulations show that our model does a good job in matching the observed equity premium as well as the volatility of the market return. Our model implies that the price-dividend ratio predicts dividend growth, and as a result that prices are driven mainly by cash-flow news rather than by discount rate news. Empirical tests show that our model is consistent with the data.     

On the role of liquidity in emerging markets stock prices

This paper investigates the impact of liquidity on emerging markets' stock prices. Particular attention is given to the estimation of Jensen's alpha and the quantity of risk. Our empirical analysis gives rise to two main issues. The first is related to the presence of an extra premium, i.e. “alpha puzzle”. The second is the time-varying component of the quantity of risk, i.e. “beta puzzle”. We find that local liquidity factors do not explain the presence of positive and statistically significant alphas. This puzzle is solved by means of transaction costs. In addition, we show that global liquidity factors, such as VIX and Open Interest, statistically affect the market price of risk. Our empirical finding proves the time varying nature of the global risk factors. Finally, we argue that standard asset pricing models cannot solve the two puzzles simultaneously.     

The housing market and excess monetary liquidity in China

This study investigated the performance of the housing market in China, determining that from a long-term perspective, an equilibrium relationship exists between housing prices and output. However, the housing market may not be efficient in the short run. Based on the correlation between housing returns and the economic growth rate, 3 distinct states can be discerned in the performance of the Chinese housing market. The first state is a bubble period, during which housing returns are excessively high and negatively correlated with the economic growth rate; the second state is a correction period, during which housing prices are corrected toward market fundamentals; and the third state is a calm market period, during which no substantial performance or trends manifest. This study determined that excess monetary liquidity significantly influenced the housing market states; however, no such effect was observed when the interest rate was adjusted. Thus, the findings implicate that if the People’s Bank of China intends to avoid losing control of the housing market, it should exercise monetary control to avoid excess liquidity in the housing market.     

Environmental disclosure and stock market liquidity: evidence from Arab MENA emerging markets

The objective of this study is to examine the impact of environmental disclosure levels on the stock market liquidity of Arab Middle Eastern and North African (MENA) companies. For that, a self-constructed disclosure index was applied to the annual reports for the years 2010, 2011 and 2012 and the bid-ask spread was used as a proxy for stock market liquidity. Results indicate that levels of environmental disclosure in MENA companies are quite low. In addition, using a sample of 276 firm-year observations, multivariate analysis shows that the higher the level of environmental disclosure provided in the annual reports, the lower the spread between the market bid and ask prices, thereby indicating an increase in stock market liquidity.     

股票市场发展与经济增长——从流动性的视角

基于前人的重要结论,从流动性的角度,将流动性分为成交量、换手率两个方面。通过向量自回归（VAR）建立模型进行进一步的研究,得出股票交易成交量与经济增长的长期均衡关系,并通过VECM模型与Granger因果关系检验对所建立的模型进行进一步验证。研究结果显示,股票市场的流动性与经济增长存在显著的关系。进一步研究换手率对股票流动性的影响可得出的结论是,股票市场的流动性与经济增长存在长期的均衡关系,并且流动性中,成交额与经济增长存在正向关系,而换手率与经济增长存在负向关系,两者都是通过影响股票市场的总市值来进一步影响经济增长的。     

Expectation,volatility and liquidity in the housing market

Measuring housing price volatility is fundamental to understanding the dynamics of housing price risk. This article aims to explore whether a liquidity factor plays a role in explaining the second moment (i.e. the volatility) of housing prices. Housing price volatility is measured as the conditional variance of a Generalized Auto Regressive Conditional Heteroscedasticity (GARCH) model under the Adaptive Expectations framework. The empirical evidence reveals that volatility transmits from smaller housing units to larger housing units, which indirectly supports the trade-up effect discussed in the literature. In addition, less liquid housing classes are more sensitive to unexpected liquidity shocks, and the starter housing class is extraordinarily sensitive to negative liquidity shocks. Consistent with friction search theory, pricing errors are alleviated as the trading volume increases, because the valuation price tends to be more accurate as more information is available.     

关于我国股市知情交易水平及其性质的实证研究

基于Easley、Hvidkjaer和O'Hara的序贯交易模型与PIN (Probability of Information-based Trading,基于信息的交易比率)指标对我国股市知情交易情况进行的实证分析研究结果表明:(1)我国股市信息不对称程度较高;(2)由于知情交易者利用坏消息的能力有限且流动性交易水平较高,我国股市知情交易比率并不太高;(3)知情交易比率与后续期间股票收益率的负相关性,表明我国股市中市场操控型知情交易比较严重.因此,我们认为应进一步完善上市公司的信息披露制度,降低投资者之间的信息不对称程度,同时确保流动性投资者参与股市的积极性;在引入做空机制时应慎重考虑和综合权衡,避免不适当地增加流动性投资者所承担的逆向选择风险水平,降低股市的流动性供给和风险分散功能;证券市场监管部门应进一步加强对异常交易活动的监控,加大对市场操纵行为的打击力度,以确保我国证券市场的健康发展.     

Empirical tests on the asset pricing model with liquidity risk: An unobserved components approach

The aim of this paper is to test empirically the conditional liquidity-adjusted capital asset pricing model (L-CAPM) developed by Acharya and Pedersen (2005). Accordingly, we propose to estimate the L-CAPM using unobserved components methodology, which allows us to take into account the main stylized facts characterizing liquidity. Based on a sample of firms listed on the NASDAQ, our empirical analysis reveals several findings. Firstly, we show that liquidity is time-varying and exhibits strong seasonality. Secondly, we highlight the impact of the liquidity level premium on asset prices. Thirdly, we show that the most important liquidity risk is related to the covariance between portfolio illiquidity and market returns. Fourthly, we observe a negative relationship between portfolio returns and market illiquidity. Fifthly, we find that liquidity risk and illiquidity level are not always positively correlated.     

Rolling settlement and market liquidity

This paper investigates the impact on UK stock and option markets of the change from an account based settlement system to a rolling settlement procedure. Such a change increases the transaction costs of short-term margin traders, and is likely to impact on the liquidity of the underlying market, as well as trading in the options market. Evidence is presented that the settlement procedure does impact on the liquidity of the market. Further, we find that rolling settlement increased market liquidity, consistent with the exit of margin traders as a result of the increase in short selling costs. Associated with this increase in liquidity is a significant reduction in nonoptionable stock trading volume, implying that margin trading may have been more prevalent in stocks without options. Finally, it is shown that while trading in stock options increased, the volatilities implied from call and put option prices indicate that put options have become relatively more expensive. This reflects the change in demand induced by the new settlement procedure, especially in terms of the increase in short selling costs.     

资产选择、风险偏好与储蓄存款需求

本文以消费者最优资产选择模型为基础,采用局部均衡分析方法探讨了通货膨胀、股市收益波动、消费者风险偏好对储蓄存款需求的影响。2001年6月以后,通货膨胀方差下降,股市持续下跌,股市收益率下降,收益率方差也有所下降,但货币需求却加速增长。本文根据不同的相对风险回避指数,模拟了利率、通货膨胀、股市收益率、股市收益率方差等因素对2001年6月至2005年9月平均储蓄存款的影响。在适当的相对风险回避指数下,储蓄存款增加的30%左右可以由这些因素解释;如果不考虑GDP等规模变量,股市收益率下降是导致平均货币需求增长的主要因素。     

Does Shariah compliance make interest rate sensitivity of Islamic equities lower? An industry level analysis under different market states

This paper examines the sensitivity of the Dow Jones Islamic market index and its corresponding industry equity indices to changes in the level, slope and curvature of the U.S. term structure of interest rates over the period 1996–2015 using the quantile regression approach. The empirical results reveal that the Islamic stock market has a considerable negative exposure to interest rate risk, although a declining time pattern of interest rate sensitivity is observed. The unexpected changes in the level factor of the U.S. yield curve, closely linked to long-term interest rates, are identified as the most important interest rate factor in explaining the variability of Islamic equity returns. Furthermore, the interest rate exposure tends to be stronger during extreme bearish conditions in the stock market, possibly due to the greater pessimism and risk aversion under these market circumstances. It is also shown that Islamic equities are not different from their mainstream counterparts in terms of interest rate sensitivity, indicating that the Islamic stock market does not provide a cushion against interest rate risk.     

三种度量基准下的无风险利率实证比较

以上证综指、深圳成指和沪深300指数为研究样本,构建了多因子模型,并利用2003年1月—2009年2月三类指数收益率及各因子的月度数据,用最小二乘法实证反演了上海证券交易市场、深圳证券交易市场以及沪深综合证券交易市场隐含的无风险利率和风险价值。研究发现:股市隐含的风险补偿为负,与传统的风险溢价理论相悖;以短期银行存款利率、7天Shibor利率及7天国债回购利率为度量基准,股市隐含的无风险利率与其存在较大差异,因此在金融衍生品等相关研究中不宜不加选择地将它们作为无风险利率的代理指标。     

Single Beta Models and Currency Futures Prices

The conditional capital asset pricing model is applied to foreign currency futures prices, covariance risk being measured relative to excess returns from a broadly diversified international portfolio of equities. Positive time-varying risk premia are found in all five currencies tested when the difference between the US and the average foreign interest rates is used as an instrumental variable for the expected excess return from the common stock portfolio.     

The effect of the liberalization of the Chinese stock market on returns

We examine the short-term effects of the liberalization of the Chinese stock market on returns. We find a positive and significant abnormal return associated with the announcement of the liberalization of the Shanghai Stock Exchange. Exploiting features of the reform, we are able to compare stocks directly and indirectly affected by the liberalization. We find that all stock prices reflect this announcement premium equally, suggesting that the premium does not reflect an increase in expected liquidity. We further find that observed liquidity, as measured by volume and price impact, did not increase following the liberalization. We conclude that the observed premium reflects a diversification benefit for Chinese investors.     

Model uncertainty and liquidity

Extreme market outcomes are often followed by a lack of liquidity and a lack of trade. This market collapse seems particularly acute for markets where traders rely heavily on a specific empirical model such as in derivative markets like the market for mortgage backed securities or credit derivatives. Moreover, the observed behavior of traders and institutions that places a large emphasis on “worst-case scenarios” through the use of “stress testing” and “Value-at-Risk” seems different than Savage expected utility would suggest. In this paper, we capture model-uncertainty using an Epstein and Wang [Epstein, L.G., Wang, T., 1994. Intertemporal asset pricing under Knightian uncertainty. Econometrica 62, 283–322] uncertainty-averse utility function with an ambiguous underlying asset-returns distribution. To explore the connection of uncertainty with liquidity, we specify a simple market where a monopolist financial intermediary makes a market for a propriety derivative security. The market-maker chooses bid and ask prices for the derivative, then, conditional on trade in this market, chooses an optimal portfolio and consumption. We explore how uncertainty can increase the bid–ask spread and, hence, reduces liquidity. Our infinite-horizon example produces short, dramatic decreases in liquidity even though the underlying environment is stationary. We show how these liquidity crises are closely linked to the uncertainty aversion effect on the optimal portfolio. Effectively, the uncertainty aversion can, at times, limit the ability of the market-maker to hedge a position and thus reduces the desirability of trade, and hence, liquidity.